38781868189512 has 128 divisors (see below), whose sum is σ = 113442268262400. Its totient is φ = 10817113724928.

The previous prime is 38781868189507. The next prime is 38781868189523. The reversal of 38781868189512 is 21598186818783.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12225153 + ... + 15067119.

It is an arithmetic number, because the mean of its divisors is an integer number (886267720800).

Almost surely, 2^{38781868189512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38781868189512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56721134131200).

38781868189512 is an abundant number, since it is smaller than the sum of its proper divisors (74660400072888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38781868189512 is a wasteful number, since it uses less digits than its factorization.

38781868189512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843915 (or 2843911 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 75.

The spelling of 38781868189512 in words is "thirty-eight trillion, seven hundred eighty-one billion, eight hundred sixty-eight million, one hundred eighty-nine thousand, five hundred twelve".